The audio frequency amplifier with preamplifier on TDA 2002 (4W)
Below the scheme uses TDA 2002 as an amplifier. The scheme produces 4 Watts when powered 15 Volts. The minimum input signal 95 mV with pre-amplifier on the scheme and 0.65 In without him.
4.7 Ohm potentiometer
Proportional to the impedance of a speaker varies the output power, respectively:
6,5 W rms
4,2 W rms
2,25 W rms